SCATTERING PARAMETERS MEASUREMENT OF A NONRECIPROCAL COUPLING STRUCTURE

A novel ferrite image guide was designed and tested from 26.5 to 40 GH z. The nonreciprocal structure consisted of two dielectric image guide s separated by a ferrite slab. M-type hexagonal ferrite was used with its C-axis oriented parallel and perpendicular to the direction of pro pagation. Electromagnetic scattering S-parameters of the device were m easured for a nonuniform external biasing magnetic field applied paral lel to the C-axis of the ferrite slab. Nonreciprocal effects were obse rved for all cases considered above. Our results implied applications for ferrite devices operating at millimeter wavelength frequencies, su ch as: isolators, filters, modulators, switches, phase shifter etc.